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Red 18 AWG stranded copper automotive primary wire on 100 ft spool

SOUTHWIRE COMPANY

SOUTHWIRE COMPANY 55667423 18 AWG Automotive Primary Wire 100 ft Red

SKU CH-BHJD-JNDWY

18 AWG stranded copper automotive primary wire with PVC insulation rated for 60 V, supplied in a 100 ft red reel

  • Product typeAuto
  • 18 AWG stranded copper carries low-voltage circuits reliably
  • 60 V PVC insulation resists abrasion and fluids in engine bays
  • 100 ft red spool simplifies colour-coded loom routing
  • Single-conductor GPT design fits standard automotive terminals
  • Southwire manufacturing ensures consistent conductor quality

Application & fit

Southwire 55667423 is 18 AWG automotive primary wire built for low-voltage vehicle circuits. The single copper conductor suits repair or new wiring jobs in cars, trucks, trailers and similar 60 V systems. Red PVC insulation provides colour coding and basic abrasion resistance.

Replaces & upgrade point

This roll replaces damaged or undersized factory GPT wire in 18 AWG circuits. The jump is worth it when existing insulation is cracked, conductors are corroded or a circuit needs a fresh, correctly rated run. It does not serve higher-gauge power feeds or multi-conductor harnesses.

Build integration

Stranded copper construction makes the wire easy to route through tight channels and terminate with standard crimp terminals. The 100 ft length covers multiple runs without splices. PVC jacket withstands typical under-hood temperatures and automotive fluids. No special tools beyond basic strippers and crimpers are required.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 75% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameSouthwire Company
Product typeAuto

Questions about this item

What size crimp terminals or connectors fit the 18 AWG stranded copper conductor?

Use terminals rated for 18 AWG stranded wire; the copper conductor accepts standard automotive crimp lugs, butt splices, or ring terminals made for that gauge.

How do I strip the PVC insulation without nicking the fine strands?

Adjust a precision stripper to the 18 AWG setting, strip only the length needed for the terminal barrel, and pull straight off to keep all strands intact.

When should I replace a run of this GPT primary wire?

Replace any section where the red PVC jacket shows cracking, abrasion through to the copper, or where insulation resistance drops below 60 V rating.

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